The most non-metallic element among the given elements is
1. | Be | 2. | B |
3. | Mg | 4. | Al |
The total number of 3rd period elements with more than one electron in a 3d orbital is:
1. | 9 | 2. | 11 |
3. | 0 | 4. | 8 |
The group of metals having the positive value of electron gain enthalpy is:
1. | Cr, Fe | 2. | Mn, Zn |
3. | Fe, Zn | 4. | Cr, Mn |
Percentage ionic character, if electronegativity value of X=2.1 & Y=3.0, is :-
1. | 20 | 2. | 30 |
3. | 17 | 4. | 23 |
The correctly matched option is:-
1. : Order of atomic radius
2. O > C > B > N : Order of ionisation energy
3. : Increasing order of Zeff
4. O < N < F < Ne : Order of electron affinity
The pair that has both members from the same period of the Periodic Table is
1. | Cl, Br | 2. | Ca, Cl |
3. | Na, Ca | 4. | Na, Cl |
Identify the INCORRECT match.
Name | IUPAC Official Name |
a. Unnilunium | (i) Mendelevium |
b. Unniltrium | (ii) Lawrecium |
c. Unnilhexium | (iii) Seaborgium |
d. Unununnium | (iv) Darmstadtium |
1. | (b)- (ii) | 2. | (c)- (iii) |
3. | (d) -(iv) | 4. | (a)- (i) |
Element of the third period that is expected to exhibit positive electron gain enthalpy is:
1. | Na | 2. | Al |
3. | Cl | 4. | Ar |
The atomic species that has the maximum ionization energy is :
1. | O- | 2. | S- |
3. | Se- | 4. | Te- |